I don't..

I thought of this because I do a lot of boondock camping while I deer hunt..My camper has a propane fridge but it's fairly inefficient, and I would rather use my propane for heat..

I take two large coolers one for ice and one for food.. I get tired of constantly draining water of my food cooler to keep it from floating in water..

Well I found a video of a guy building a cooler just like I imagined..

http://www.youtube.com/watch?v=Tjh6RDTgMuQ